Triac - measuring method described plastic pipe has been triggered thyristor conduction (I + trigger mode) SCR BT136S-600E, certify that the above assumptions hold SCR T405-800T, namely black bars then that is the T1 . If another slide in the red bar - after pole display is Ugt1, you can simply change the black bars connected to another unknown pole repeat the above steps, will be able to reach the right result. Triac - thyristor at this time measurement plastic tube to the SCR into conduction state, should show a slightly lower value than Ugt1. Next SCR T435-600T, the red bar at the premise and constantly open T2 from G, to trigger a high sensitivity, maintaining the current small tube, the tube remains at this time conducting state, the display than the trigger conduction When slightly larger, but less than Ugt1 SCR T435-800T, SCR, is provided by Wal-electronic Dongguan City is fertile Electronic Technology Co., Dongguan City is Wo Electronic Technology Co., Ltd (www.dgmydz.com) (www.dgmydz.com) strong, credible, FET and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead positive fertile electronic and you hand into the brilliant, for a better future!